Improvement in lead-penc



T. H. MULLER.

Lead-Pencils.

Patented March 25, 1873.

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UNITED STATESI PATENT OFFICE.

TEILE H. MLLER, OF YONKERS, NEW YORK.

IMPROVEMENT IN LEADPENCJLS.

Specification forming part of Letters Patent No. 137,0S9, dated March 25, 1873.

` To all whom it may concern:

Be it known that I, TEILE H. MLLER, of Yonkers, Westchester county, New York, have invented certain new and useful Improvements in Lead-Pencils, of which the following is a specification: j

This invention relates to lead-pencils in general, but is perhaps of special value in connection with that class of pencils consisting of a holder provided with a lead capable of being projected more or less from the holder, and then clamped or held in the desired position. To sharpen such a pencil, it becomes desirableto combine with said pencil some convenient device for reducing the lead and bringing it to a point. 'Io this end I form in the end of the holder opposite to that in which the lead is held or inserted an enlarged cavity, and combine therewith aiile, which is, when not in use, designed to be contained in said cavity, and is provided with a handle constituting the stopper of such cavity or the head of the pencil.

In the accompanying` drawing, Figure l represents a side elevation of a pencil made in accordance with my invention. Fig. 2 is a vlongitudinal central section of the same. Fig. 3 is. a View of the iile and its handle removed from the pencil.

A is an ordinary holder of Wood or other suitable material, provided at one end with a movable lead held in a suitable socket, a, in the pencil, and arranged to project through yielding jaws upon the tapering end ot the pencil, which is screw-threaded to receive a correspondingly screw-threaded and tapering metallic clamping-sleeve, B, the arrangement and construction of these parts being such as shown and claimed in the patent granted to Horace J. Wickham, May 16,1871. The other end ot' the holder is formed with a cavity, b, closed by a stopper or head, c, to which is attached a file, d, which is designed to be used for sharpening the lead point. This fille, when not in use, is contained in the cavity B, which cavity is closed by the file-handle o, the latter constituting the head of the pencil. In order that thewalls of the cavity in the pencil may not expand, I prefer to iit a metal t'errule around this end of the pencil, so that the handle of the ile shall always tit snugly in the tube or cavity without expanding it.

It will also be understood that the invention is applicable to lead-pencils of other kinds-as, for instance, to an ordinary Wooden y pencil, the sheath of which must be cutaway as the lead wears. The difficulty in sharpening a pencil is not in cutting away the Wood, but in reducing and bringing the lead to a point after the wood has been cut away. This difculty is obviated by my invention, as the l pencil will be provided with a device by which this sharpening or pointing can readily be effected.

Having now described my invention, and the manner in which the saine is or may be carried into effect, what I claim, and desire to secure by Letters Patent, is

The herein-described pencil, consisting of a sheath containing a lead, substantially as described, and formed at the rear end with an enlarged cavity containing a tile, the handle of which constitutes the stopper or head of the sheath, as set forth. n

T. H. MULLER.

Witnesses:

M. BAILEY,

I. BULKLEY. 

